Crosscurrents: June 6, 2012

Neighborhood watches grow in Oakland; Question Bridge - Black Males: Do you have a problem eating fried chicken, watermelon, and bananas in front of white people?; "Streetopia" - part exhibit, part festival; and local duo Black Cobra.

There’s talk that we’re in the midst of a second tech boom in San Francisco. Twitter is opening its new headquarters in the Central Market district and residents are buzzing about what’s to come. Mayor Ed Lee has been courting start-ups since he came into office, hoping they’ll bring thousands of new jobs to the city.